I broke CQWP, how to fix it ?

I sort of broke the CQWP on top-level site while trying to customize it viathe many posts on WEB. It seemed very straightforward, but.... In general whatI intended to do was:1) modify xslt of ItemStyleSheet of top-level site to have CQWP displayavailable data fields from lists2) modify the CQWP to pick additional data fields as desired3) re-modify the ItemStyleSheet to display the additional fields.

Did not get #1 to succeed. CQWP will not display at all, says contact siteadministrator(me). I tried deleting the old CQWP and inserting a new one as anew WP using the GUI. It too will not display at all.

I carefully copied and pasted an existing style using SPD, renamed the newstyle, & then added 3-4 lines to display names per WEB examples. I'm guessingI messed up with the check out, check in, and file saves.

What is the relationship between the check in and file saves? Do they have tobe done in a particular sequence? I think I tried all sequences. If I did messup the html lines, what would the error symptons be? I did not try to re-setthe site definition yet.

Go4Sharepoint, is a Microsoft Featured Community.
Microsoft, Windows, Sharepoint, Sharepoint logo, Windows logo, etc are trademarks of the Microsoft Corporation.
All product names, logos, copyrights, and trademarks mentioned are acknowledged as the registered intellectual property of their respective owners. This site is not in any way affiliated with, nor has it been authorized, sponsored, or otherwise approved by, Microsoft Corporation.